Space heater



FIG. 1 is a front perspective view of the space heater;

FIG. 2 is a front elevational view of the space heater of FIG. 1;

FIG. 3 is a rear elevational view of the space heater of FIG. 1;

FIG. 4 is a left elevational view of the space heater of FIG. 1;

FIG. 5 is a right elevational view of the space heater of FIG. 1;

FIG. 6 is a top plan view of the space heater of FIG. 1; and,

FIG. 7 is a bottom plan view of the space heater of FIG. 1.

The broken lines shown in the drawings are for the purpose of illustrating portions of the article that form no part of the claimed design. 

CLAIM The ornamental design for a space heater, as shown and described. 